JP2002318034A - Condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser constituted rationally. SOLUTION: In the condenser equipped with a core 200 constituted of stacking tubes 210, a first tank 310, a second tank 320 and an inlet part 400 and an outlet part 500 of a refrigerant, the first tank and the second tank are sectioned respectively into a plurality of chambers 301 in the inside. A receiver 600 is made to communicate with the chamber of the first tank, while a part of the core is made a supercooling part 201 for cooling the refrigerant of liquid layers, and the layer 201A for making the refrigerant flow from the chamber of the first tank to that of the second tank and the layer 201B for making it flow from the chamber of the second tank to that of the first tank are provided in the supercooling part. Regarding the supercooling part, moreover, the total sectional area of a refrigerant passage in the layer making the refrigerant flow from one chamber to the other of the first and second tanks is set to be larger than the sectional area of the refrigerant passage which makes the refrigerant flow, from the receiver to the chamber of the first tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core formed by laminating tubes through which a refrigerant flows, a first tank connected to one end of the tube, and a second tank connected to the other end of the tube. And a condenser provided with an inlet portion and an outlet portion for the refrigerant provided in the first tank and the second tank, wherein the refrigerant flowing from the inlet portion is cooled by heat transmitted to the core and flows out from the outlet portion.

[0002]

2. Description of the Related Art In general, a condenser in a refrigeration cycle is constituted by alternately stacking a plurality of tubes and a plurality of fins to form a core, and connecting the ends of the tubes to a pair of tanks. . Refrigerant is taken into the inside from the inlet part provided at the key point of the tank, and after passing through the tube while being cooled by the heat transmitted to the core,
It is discharged to the outside from an outlet provided at a key point in the tank.

As this type of capacitor, for example, as described in Japanese Patent Application Laid-Open No. 7-180930,
It is known that a part of the core is a supercooling part. That is, the tank is partitioned at a predetermined interval inside, and a liquid receiver that separates the refrigerant into a gas layer and a liquid layer is provided,
The supercooling unit is configured to cool the refrigerant in the liquid layer separated by the liquid receiver. According to such a configuration, the refrigeration efficiency of the refrigeration cycle can be improved.

[0004] Such a condenser having a supercooling section (commonly called a subcool condenser) can be suitably used, for example, for a refrigeration cycle mounted on an automobile. It has been confirmed that it is extremely effective when the idling is extremely small.

[0005]

By the way, as for the refrigeration cycle, it is required to save the installation space and to further reduce the manufacturing cost. For the above-mentioned condenser, a condenser having a small size and excellent performance is desired. It is rare.

The present invention has been made in view of such a situation, and has as its object to provide a rationally configured capacitor.

[0007]

Means for Solving the Problems The invention described in the first aspect of the present invention comprises a core formed by laminating tubes through which a refrigerant flows, a first tank connected to one end of the tubes, and a tube. A second tank to which the other end of the first tank is connected, and an inlet and an outlet for the refrigerant provided in the first tank and the second tank, and transfer the refrigerant flowing from the inlet to the core. In the condenser flowing out of the outlet and the first tank and the second condenser.
The tanks are each partitioned into a plurality of chambers, and the chambers of the first tank communicate with a liquid receiver that separates a refrigerant into a gas phase and a liquid phase, and a part of the core. Constitutes a supercooling section for cooling the refrigerant in the liquid layer separated by the liquid receiver, and the refrigerant flows from the chamber of the first tank to the chamber of the second tank in the supercooling section. And a layer that flows from the at least one chamber of the second tank to the at least one chamber of the first tank. According to such a configuration, the capacitor is rationally configured.

That is, the supercooling unit is set at an appropriate ratio with respect to a predetermined core size by taking into account the efficiency of a refrigeration cycle using such a condenser. However, since the refrigerant normally only flows from the chamber of the first tank to the chamber of the second tank, when the ratio of the supercooled portion in the core increases, the flow rate of the refrigerant decreases, and this is the heat exchange performance. In some cases, it caused a decline. In other words, the cause of the decrease in the heat exchange performance may be stagnation (decrease in the amount of stirring) of the refrigerant due to the decrease in the flow rate. In this regard, since the supercooling unit of the present invention has a configuration in which the refrigerant reciprocates at least once between the first tank and the second tank, the flow velocity of the refrigerant is sufficiently ensured, and such inconvenience is avoided.

According to a second aspect of the present invention, in the first aspect, the outlet is a capacitor provided in the first tank. That is, since the cooling unit of the present invention has a configuration in which the refrigerant reciprocates between the first tank and the second tank, it is possible to provide the receiver and the outlet in one of the tanks. According to this, the degree of freedom of design is improved.

For example, in a case where a condenser having no supercooling section is replaced with a condenser having a supercooling section in a refrigeration cycle mounted on an automobile, according to the conventional condenser, the first tank is inevitably received in the first tank. Since the vessel is provided and the outlet is provided in the second tank, it may be difficult to match the positions of the inlet and the outlet. In this regard, by providing the outlet portion in the first tank, such a case can be dealt with, and compatibility can be easily ensured.

According to a third aspect of the present invention, in the first or second aspect, in the supercooling section, a refrigerant flows from one chamber of the first tank and the second tank to the other chamber. The total cross-sectional area of the refrigerant flow path in the layer is a capacitor having a configuration that is larger than the cross-sectional area of the refrigerant flow path that flows refrigerant from the liquid receiver into the chamber of the first tank. The capacitor is more reasonably configured.

That is, in the condenser of the present invention, the total cross-sectional area of the refrigerant flow path in the layer of the supercooling section is larger than the cross-sectional area of the refrigerant flow path that flows the refrigerant from the liquid receiver into the chamber of the first tank. By setting, an unnecessary increase of the flow path resistance in the supercooling section is surely avoided. If the total cross-sectional area of the refrigerant flow path is small, the pressure inside the condenser is increased unnecessarily, causing a decrease in the flow rate of the refrigerant. In the present invention, such inconvenience is avoided.

In particular, in the supercooling section of the present invention, the refrigerant makes at least one reciprocation between the first tank and the second tank, and the number of reciprocations ensures an appropriate ratio of the subcooling section to the core. In addition, it is set within a range where the present configuration is maintained.

According to a fourth aspect of the present invention, a core formed by laminating tubes through which a refrigerant flows, a first tank connected to one end of the tube, and the other end of the tube are connected to each other. A connected second tank, comprising a refrigerant inlet and an outlet provided in the first tank and the second tank, cooling the refrigerant flowing from the inlet with heat transmitted to the core, In the condenser flowing out from the outlet, the first tank and the second tank each have an interior partitioned into a plurality of chambers. In the chamber of the first tank, refrigerant is stored in a gas phase and a liquid phase. A part of the core is formed as a supercooling unit that cools a refrigerant in a liquid layer separated by the liquid receiver, and a part of the core is connected to the first cooling unit. Flow from one chamber of the tank and the second tank to the other chamber The total cross-sectional area of the refrigerant flow path in the layer to be formed is a capacitor having a configuration that is larger than the cross-sectional area of the refrigerant flow path through which the refrigerant flows from the liquid receiver into the chamber of the first tank. , The capacitor is reasonably configured.

That is, in the condenser of the present invention, the total cross-sectional area of the refrigerant flow path in the layer of the supercooling section is larger than the cross-sectional area of the refrigerant flow path that flows the refrigerant from the receiver into the chamber of the first tank. By setting, an unnecessary increase of the flow path resistance in the supercooling section is surely avoided. If the total cross-sectional area of the refrigerant flow path is small, the pressure inside the condenser is increased unnecessarily, causing a decrease in the flow rate of the refrigerant. In the present invention, such inconvenience is avoided.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The condenser 1 of the present embodiment is used for a refrigeration cycle for in-vehicle air conditioning mounted on an automobile. The refrigeration cycle includes a compressor for compressing the refrigerant, a condenser 1 for cooling the compressed refrigerant, an expansion valve for decompressing the cooled refrigerant, and an evaporator for evaporating the depressurized refrigerant.

As shown in FIGS. 1 to 5, the condenser 1 has a core 200 formed by alternately laminating a plurality of tubes 210 and a plurality of fins 220 through which a refrigerant flows, and one end of the tube 210. Connected first tank 310
And a second tank 320 to which the other end of the tube 210 is connected, and a refrigerant inlet 400 and an outlet 500 provided in the first tank 310 and the second tank 320. The cooled refrigerant is cooled by the heat transmitted to the core 200 and flows out from the outlet 500. The refrigerant condenses by being cooled in the core 200.

The tube 210 of this embodiment is of a flat shape formed by rolling a plate, and has a plurality of channels 211 formed therein to obtain a required pressure resistance. In the core 200, a plurality of tubes 210 of the same type are used.

First tank 310 and second tank 320
Are cylindrical members in which the partition plates 302 are arranged at predetermined intervals, respectively, and the inside thereof has a plurality of chambers 30.
It is divided into 1. Inlet part 400 and outlet part 500
Is a pipe-shaped or block-shaped member that connects a predetermined chamber 301 with an external pipe.

Further, the chamber 301 of the first tank 310 communicates with a liquid receiver 600 for separating the refrigerant into a gas layer and a liquid layer, and a part of the core 200 is separated by the liquid receiver 600. The supercooling unit 201 cools the refrigerant in the liquid layer.

That is, the refrigerant is once sent from the tank 300 to the liquid receiver 600 in the process of flowing from the inlet 400 to the outlet 500, and only the liquid layer is directed to the outlet 500.

In the case of this example, the ratio of the supercooled portion 201 to the core 200 is 2
It is about 5-35%. For example, when the number of all the tubes 210 in the core 200 is 41 and the number of the tubes 210 in the supercooling unit 201 is 14, the ratio of the supercooling unit 201 is about 34%.

The first tank 310 and the liquid receiver 600 are detachably connected via a connector 700 provided on the first tank 310 side.

The upper and lower sides of the core 200 are provided with side plates 800 as reinforcing members. Both ends of each side plate 800 are supported by a first tank 310 and a second tank 320, respectively.

The tubes 210, the fins 220, the first tank 310 and the second
The tank 320, the inlet section 400, the outlet section 500, the connector 700, and the side plate 800 are integrally formed by assembling respective members formed by molding aluminum or an aluminum alloy, and heating the assembled body in a furnace. are doing. The cladding of the brazing material, the application of flux, and the like are performed in advance at key points of each member. However, the connector 700 and the like can be separately brazed by a torch.

The connector 700 according to the present embodiment includes a first tank 31.
0 first pipe portion 710 inserted into the predetermined atrioventricular chamber 301
And a second pipe portion 720 connected to the inflow opening of the liquid receiver 600, a third pipe 730 connected to the outflow opening of the liquid receiver 600, and inserted into a predetermined chamber 301 of the first tank. A second pipe portion 740, a refrigerant flow path through which refrigerant flows from a predetermined chamber 301 of the first tank 310 to the receiver 600, and a predetermined chamber 3 of the first tank from the receiver 600.
01 and a refrigerant flow path through which the refrigerant flows into the fuel cell 01.

The connector 700 is provided with an insertion portion 750 for inserting a bolt, and the liquid receiver 600 is provided with a female screw portion for screwing the bolt. It is detachably attached by screwing a bolt inserted into 750 into a female screw portion.

The refrigerant is fed into the inlet pipe 610 from the inlet opening provided at the bottom of the receiver 600 through the connector 600, and rises up the inlet pipe 720 and is jetted into the receiver 600. Then, the liquid layer accumulates in the lower part of the liquid receiver 600 and is separated into a gas layer and a liquid layer.

The liquid layer refrigerant accumulated in the lower part of the liquid receiver 600 passes through the refrigerant channel of the connector 700 from an outflow opening provided at the bottom of the liquid receiver 600, and passes through a predetermined chamber of the first tank 310. And further flows through the tube 210 while performing heat exchange in the supercooling section 201 to the outlet section 500.
The liquid receiver 600 includes a desiccant layer and a filter 620, and moisture and impurities contained in the refrigerant are removed by the passage of the refrigerant.

Further, in the supercooling section 201 of this embodiment, the first layer 201A through which the refrigerant flows from the chamber 301 of the first tank 310 to the chamber 301 of the second tank 320, and the chamber of the second tank 320 From the chamber 301 to the chamber 301 of the first tank 310
And a second layer 201B that circulates to the medium.
The supercooling section 210 is configured to reciprocate between the first tank 310 and the second tank 320.

That is, the first tank 310 has an chamber 702 communicating with the first pipe 710 of the connector 700,
Fourth pipe section 740 of connector 700 and first layer 20
The first chamber 201A and the second layer 2 are provided in the second tank 320. The first chamber 201A communicates with the second chamber 201 and the second chamber 201 communicates with the outlet section 500.
A chamber 301 that communicates with 01B is set.

As described above, according to the configuration in which the refrigerant reciprocates between the first tank 310 and the second tank 320 in the supercooling section 201, a good flow velocity of the refrigerant can be ensured.

The first layer 201A and the second layer 201
The number of tubes 210 in B is set equal. For example, when the number of tubes 210 in the supercooling unit 201 is 14, the first layer 201A and the second layer 2
The number of tubes 210 in 01B is seven each. However, in consideration of the case where the refrigerant in the gas phase is mixed into the refrigerant in the liquid layer to some extent, some condensation occurs even in the supercooling section, so the number of the first layers 201A is
Of course, it may be set to be larger than the number of 01B. For example, the tube 210 in the first layer 201A
May be eight, and the number of tubes 210 in the second layer 201B may be six.

Further, in this embodiment, regarding the supercooling section 201, the total cross-sectional area of the refrigerant flow path in the first layer 201A, and
And the total cross-sectional area of the refrigerant channel in the second layer 201B is:
The refrigerant is supplied from the receiver 600 to the chamber 301 of the first tank 310.
Is set larger than the cross-sectional area of the refrigerant flow path flowing into the refrigerant passage. That is, the first layer 201A and the second layer 201B
, The sum of the cross-sectional areas of the flow paths 211 formed in the tube 210 is set to be larger than the reference area of the fourth pipe portion 740 of the connector 700. According to such a configuration, an unnecessary increase in the flow path resistance in the subcooling unit 201 can be reliably avoided.

Although the inlet 400 is shown as being provided in the second tank 320, the inlet 400 may be provided in the first tank 310 by appropriately setting the number and spacing of the chambers 301. .

The core 200 has a structure in which the refrigerant reciprocates even in portions other than the supercooling section 201. Alternatively, by appropriately setting the number and intervals of the chambers 301, as shown in FIG. It is also possible to configure so that the refrigerant reciprocates only in the supercooling section 201.

As described above, the condenser of the present embodiment has a very rational structure, and can be suitably used for a refrigeration cycle mounted on an automobile.

[0039]

According to the first aspect of the present invention, a core formed by laminating tubes through which a refrigerant flows, a first tank connected to one end of the tube, and the other end of the tube are provided. A second tank connected to the first and second tanks, and an inlet and an outlet for the refrigerant provided in the first and second tanks. The refrigerant flowing from the inlet is cooled by heat transmitted to the core. In the condenser flowing out from the outlet, the first tank and the second tank each have an interior partitioned into a plurality of chambers, and the refrigerant in the chamber of the first tank is a gas layer and a liquid. A part of the core is formed as a supercooling unit that cools the refrigerant of the liquid layer separated by the liquid receiver, and the supercooling unit includes a refrigerant. A layer flowing from the at least one chamber of the first tank to the at least one chamber of the second tank; A configuration capacitor provided with a layer flowing from the atrioventricular of the second tank to the atrioventricular of the first tank, with such a configuration, the capacitors can be rationally constructed.

According to a second aspect of the present invention, in the first aspect, the outlet is a capacitor having a structure provided in the first tank. That is, since the cooling unit of the present invention has a configuration in which the refrigerant reciprocates between the first tank and the second tank, it is possible to provide the receiver and the outlet in one of the tanks. According to this, the degree of freedom of design can be improved.

According to a third aspect of the present invention, in the first or second aspect, the refrigerant flows from one chamber of the first tank and the second tank to the other chamber in the supercooling section. The total cross-sectional area of the refrigerant flow path in the layer is a capacitor having a configuration that is larger than the cross-sectional area of the refrigerant flow path that flows refrigerant from the liquid receiver into the chamber of the first tank. The capacitor can be configured more rationally.

According to a fourth aspect of the present invention, a core formed by laminating tubes through which a refrigerant flows, a first tank to which one end of the tube is connected, and another end of the tube are provided. A connected second tank, comprising a refrigerant inlet and an outlet provided in the first tank and the second tank, cooling the refrigerant flowing from the inlet with heat transmitted to the core, In the condenser flowing out from the outlet, the first tank and the second tank each have an interior partitioned into a plurality of chambers. In the chamber of the first tank, refrigerant is stored in a gas phase and a liquid phase. A part of the core is formed as a supercooling unit that cools a refrigerant in a liquid layer separated by the liquid receiver, and a part of the core is connected to the first cooling unit. Flow from one chamber of the tank and the second tank to the other chamber The total cross-sectional area of the refrigerant flow path in the layer to be formed is a capacitor having a configuration that is larger than the cross-sectional area of the refrigerant flow path through which the refrigerant flows from the liquid receiver into the chamber of the first tank. The capacitor can be rationally configured.

[Brief description of the drawings]

FIG. 1 is a front view showing a capacitor according to a specific example of the present invention.

FIG. 2 is a cross-sectional view illustrating a main part of a capacitor according to a specific example of the present invention.

FIG. 3 is a perspective view showing a tube according to a specific example of the present invention.

FIG. 4 is a perspective view showing a connector according to a specific example of the present invention.

FIG. 5 is an explanatory view showing a capacitor according to a specific example of the present invention.

FIG. 6 is an explanatory view showing a capacitor according to a specific example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Condenser 200 Core 201 Supercooling part 201A 1st layer 201B 2nd layer 210 Tube 211 Flow path 220 Fin 310 First tank 320 Second tank 301 Chamber 302 Partition plate 400 Inlet section 500 Outlet section 600 Liquid receiver 610 Inlet pipe 620 Desiccant and filter 700 Connector 710 First pipe section 720 Second pipe section 730 Third pipe section 740 Fourth pipe section 750 Insertion section 800 Side plate

Claims (4)

[Claims] A first tank connected to one end of the tube; a second tank connected to the other end of the tube; a first tank connected to one end of the tube; A condenser provided with an inlet portion and an outlet portion of the refrigerant provided in the first tank and the second tank, wherein the refrigerant flowing from the inlet portion is cooled by heat transmitted to the core, and the condenser flows out of the outlet portion. The inside of each of the first tank and the second tank is partitioned into a plurality of chambers. The chamber of the first tank communicates with a liquid receiver that separates a refrigerant into a gas phase and a liquid phase. A part of the core forms a subcooling unit that cools a refrigerant in a liquid layer separated by the liquid receiver, and the subcooling unit supplies the refrigerant from the chamber of the first tank to the second tank. A layer flowing to the atrio-room of the tank, and Capacitor, characterized by comprising a layer which flows into the atrioventricular the first tank. 2. The condenser according to claim 1, wherein the outlet is provided in the first tank. 3. A total cross-sectional area of a refrigerant flow path in a layer in which a refrigerant flows from one chamber of the first tank and the other chamber of the second tank to the supercooling section, the refrigerant receives the liquid in the liquid receiving chamber. 3. The condenser according to claim 1, wherein the cross-sectional area of the refrigerant flow path flowing from the vessel into the chamber of the first tank is larger than the cross-sectional area. 4. A core formed by laminating tubes through which a refrigerant flows, a first tank connected to one end of the tubes, a second tank connected to the other ends of the tubes, A condenser provided with an inlet portion and an outlet portion of the refrigerant provided in the first tank and the second tank, wherein the refrigerant flowing from the inlet portion is cooled by heat transmitted to the core, and the condenser flows out of the outlet portion. The inside of each of the first tank and the second tank is partitioned into a plurality of chambers. The chamber of the first tank communicates with a liquid receiver that separates a refrigerant into a gas phase and a liquid phase. A part of the core forms a subcooling unit that cools a refrigerant in a liquid layer separated by the liquid receiver, and relates to the supercooling unit, and supplies the refrigerant to one of the first tank and the second tank. Of the refrigerant flow path in the layer flowing from one chamber to the other Area, the refrigerant from the liquid receiver first
A condenser having a cross-sectional area larger than a cross-sectional area of a refrigerant flow path flowing into a chamber of a tank.